Driver side Dome light issue
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Driver side Dome light issue
I have a 2010 Honda Civic which I purchased from a private party recently.
Today, I noticed the driver side dome light does not turn ON when the driver/passenger doors are opened., but the manual operation of the same light operates normally.
Any idea what might be the cause of this issue?
Today, I noticed the driver side dome light does not turn ON when the driver/passenger doors are opened., but the manual operation of the same light operates normally.
Any idea what might be the cause of this issue?
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Joined: Jul 2004
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Re: Driver side Dome light issue
The cause is usually due to the micro-switch for the map light; but, can be due to corrosion, etc. at the map light base unit.
Both left and right map lights share the same power (+) and respective ground (-) sources during the following dual functions:
(1) turns on if pressed
(2) works if door opened.
Because the map lights have "dual functionality" there are separate ground sources involved in the circuit. The same ground source feeds both driver and passenger map lights when a door is opened. A different ground source (at the base of the unit) is used when you manually pressed them on (both left and right share this respective ground source at the base). A single power wire feeds the map lights base unit.
Therefore, it is highly unlikely going to be due to an issue with the bulb or ground wire.
The micro-switch has three small terminal cavities (female) which matches up with three (male) metal terminal blades. One of the three metal terminal blades is not making sufficient contact inside the switch for the maplight bulb (probably the blade for the ground source coming from the coming from the under-dash Multiplex Integrated Control Unit (MICU). – All the individual doors switches (at each door) are wired into the under-dash MICU (located in the under-dash fuse box).
If the switch is the same as on other Hondas, Mouser Electronics sells the ALPS switch (ALPS no. SPED210203) for $2.78 each, plus shipping. Select USPS if you want to reduce shipping costs for these switches.
See this link regarding replacement from a Honda Pilot forum, which is similar.
Honda Pilot - Honda Pilot Forums - View Single Post - Dome light problem
Both left and right map lights share the same power (+) and respective ground (-) sources during the following dual functions:
(1) turns on if pressed
(2) works if door opened.
Because the map lights have "dual functionality" there are separate ground sources involved in the circuit. The same ground source feeds both driver and passenger map lights when a door is opened. A different ground source (at the base of the unit) is used when you manually pressed them on (both left and right share this respective ground source at the base). A single power wire feeds the map lights base unit.
Therefore, it is highly unlikely going to be due to an issue with the bulb or ground wire.
The micro-switch has three small terminal cavities (female) which matches up with three (male) metal terminal blades. One of the three metal terminal blades is not making sufficient contact inside the switch for the maplight bulb (probably the blade for the ground source coming from the coming from the under-dash Multiplex Integrated Control Unit (MICU). – All the individual doors switches (at each door) are wired into the under-dash MICU (located in the under-dash fuse box).
If the switch is the same as on other Hondas, Mouser Electronics sells the ALPS switch (ALPS no. SPED210203) for $2.78 each, plus shipping. Select USPS if you want to reduce shipping costs for these switches.
See this link regarding replacement from a Honda Pilot forum, which is similar.
Honda Pilot - Honda Pilot Forums - View Single Post - Dome light problem
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